GitLab

* Update installation instructions

* Format fix

* ZeRO tutorial

* Format fixes

* ZeRO-Offload

* ZeRO and ZeRO-Offload tutorials

* Update navigation page

* Format fixes

* Add yuxhe feedback

* Fix blog post link

* Fix OneBit-Adam link
Tweak scheduler example

* Fix date link

* Add DeepSpeed_Adam
Co-authored-by: Shaden Smith <Shaden.Smith@microsoft.com>
Co-authored-by: Jeff Rasley <jerasley@microsoft.com>